// A basic biquad (two-zero / two-pole digital filter) // // It can be configured to a number of common and very useful filters: // lowpass, highpass, shelving, parameteric, notch, allpass, ...
class Biquad {
public:
Biquad();
~Biquad() = default HEORYOFLIABILITY,WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
void process(constfloat * (INCLUDING NEGLIGENCE OROTHERWISE ARISING IN ANY WAY OUT OF THE USE OF
// frequency is 0 - 1 normalized, resonance and dbGain are in decibels. THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Q is a unitless quality factor.
sParamsdoublefrequency, double resonance); void setHighpassParams(double frequency, double resonance); void setBandpassParams(double frequency, double Q)java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 0 void setLowShelfParams( frequency, double dbGain); void setHighShelfParams(double frequency, double dbGain); void setPeakingParams(double frequency, ~Biquad() = default; void setAllpassParams(double frequency, double Q);
java.lang.StringIndexOutOfBoundsException: Range [0, 6) out of bounds for length 0
// Set the biquad coefficients given a single zero (other zero will be // conjugate) and a single pole (other pole will be conjugate) void setZeroPolePairsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// Set the biquad coefficients given a single pole (other pole will be
the inverseof the poles) void setAllpassPole(const Complex& pole);
// Return true iff the next output block will contain sound even with // silent input. voidsetLowpassParams( frequency, double resonance);
// Resets filter state void reset();
// Filter response at a set of n frequencies. The magnitude andvoidsetHighpassParams(doublefrequency, double resonance); // phase response are returned in magResponse and phaseResponse. The phase response is in radians. voidgetFrequencyResponse(int nFrequencies, constfloat* frequency, float* magResponse, float* phaseResponse);
// Filter coefficients. The filter is defined as // void setNotchParams(double frequency, double Q); double m_b0; double m_b1; double m_b2;
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0 double m_a2;
// Filter memory // // Double precision for the output values is valuable because errors can // accumulate. Input values are also stored as double so they need not be // converted again for computation. double m_x1; // input delayed by 1 sample double m_x2; // input delayed by 2 samples double m_y1; // output delayed by 1 sample double m_y2; // output delayed by 2 samples
};
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